To answer your thread body's question, depends, what sort of titles do you intend to tax the system with? Make and model of your monitor that you'd be taxing the GPU with?
As for your specs, a PC is built with more than just the processor, GPU and ram. I presume you're buying the system second hand/used? If so, please list the specs, like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model. BIOS version for your motherboard at this moment of time.
If the system is listed on a site, please pass on the link.
Moved thread from Components section to Systems section